Finding the Fourth Proportional to 19,105.74, 28,598.54 and 12,061.37

Step by Step Solution

1. Step 1: Write the proportion equation
   19,105.74 : 28,598.54 = 12,061.37 : x
2. Step 2: Convert to fraction form
   19,105.74/28,598.54 = 12,061.37/x
3. Step 3: Cross multiply
   19,105.74x = 28,598.54 × 12,061.37
4. Step 4: Simplify right side
   19,105.74x = 344,937,583.59
5. Step 5: Solve for x
   x = 344,937,583.59/19,105.74
6. Step 6: Final answer
   x = 18,054.13